!!! The following update has been skipped due to unsatisfied dependencies:

x11-misc/cairo-dock-themes:0

!!! All ebuilds that could satisfy "~x11-misc/cairo-dock-1.6.3.1" have been masked.
!!! One of the following masked packages is required to complete your request:
- x11-misc/cairo-dock-1.6.3.1 (masked by: package.mask)

For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.

!!! The following update has been skipped due to unsatisfied dependencies:

media-libs/mesa:0

!!! All ebuilds that could satisfy ">=x11-proto/xextproto-7.0.99.1" have been masked.
!!! One of the following masked packages is required to complete your request:
- x11-proto/xextproto-7.1.1 (masked by: package.mask)

(dependency required by "media-libs/mesa-7.7-r1" [ebuild])

For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.

!!! Problems have been detected with your world file
!!! Please run emaint --check world

!!! Ebuilds for the following packages are either all
!!! masked or don't exist:
x11-misc/cairo-dock-themes

* Depclean may break link level dependencies. Thus, it is
* recommended to use a tool such as `revdep-rebuild` (from
* app-portage/gentoolkit) in order to detect such breakage.
*
* Always study the list of packages to be cleaned for any obvious
* mistakes. Packages that are part of the world set will always
* be kept. They can be manually added to this set with
* `emerge --noreplace <atom>`. Packages that are listed in
* package.provided (see portage(5)) will be removed by
* depclean, even if they are part of the world set.
*
* As a safety measure, depclean will not remove any packages
* unless *all* required dependencies have been resolved. As a
* consequence, it is often necessary to run `emerge --update
* --newuse --deep world` prior to depclean.

Calculating dependencies... done!
* Dependencies could not be completely resolved due to
* the following required packages not being installed:
*
* ~x11-misc/cairo-dock-1.6.3.1 pulled in by:
* x11-misc/cairo-dock-themes-1.6.3.1
*
* Have you forgotten to run `emerge --update --newuse --deep world` prior
* to depclean? It may be necessary to manually uninstall packages that no longer
* exist in the portage tree since it may not be possible to satisfy their
* dependencies. Also, be aware of the --with-bdeps option that is documented
* in `man emerge`.

!!! The following update has been skipped due to unsatisfied dependencies:

media-libs/mesa:0

!!! All ebuilds that could satisfy ">=x11-proto/xextproto-7.0.99.1" have been masked.
!!! One of the following masked packages is required to complete your request:
- x11-proto/xextproto-7.1.1 (masked by: package.mask)

(dependency required by "media-libs/mesa-7.6.1" [ebuild])

For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.

!!! The following update(s) have been skipped due to unsatisfied dependencies
!!! triggered by backtracking:

x11-misc/cairo-dock-plugins:0

!!! Problems have been detected with your world file
!!! Please run emaint --check world

!!! Ebuilds for the following packages are either all
!!! masked or don't exist:
app-cdr/kiso